Automatic optical projector



April 8 14924;

O. E. ENELL ET AL AUTOMATIC OPTICAL PROJECTOR Fil'ed Feb. 15

EN Sk April s, 1924.y

o, E. ENELL. E1' AL AUToiwrIc oPTIcAL PROJECTOR Filed Feb. 1s. -192.1 5sheets-sheet `2 WS QS April 8, 1924.

O. E. ENELL ET AL AUTOMATIC OPTICAL PROJECTOR Filed Feb. 15.'sheeTs-sheet 5 A. Qn N.

April .8, 1924;- 1,489,632 O. E. ENELL ET AL AUTOMATIC OPTICAL PROJECTORl Filed Feb. l5 1921 5 Sheets-Sheet 5 f m /Of n||||||n o 2 "mw-.IBL

92p v 072719.; Emy/ffy@ W am Patented Apr. 8, 1924.

OTTO EDWARD ENELI., OE EnsEYoiTY, NEw'JEnsfEE, 'AND J'oHNERNEsT MEYER,OE NEW Yon-K, N. Y., AssreNoEs, BY MEsNE ASSIGNMENTS., To vIcToE.THOENE, OE

NEW YORK, N. Y.

AUTOMATTC OPTICAL PROJECTOR.

Application led'Februaryj15, 1921i.` 'Serial No. 445,062.

To all whom 2i may concern:

Be it known that" we, OTTO EDWARD ENELL and JOHN ERNEST MEYER, citizens,

respectively, of tlieUnited States andthe Republic of Switzerland, andresidents, re-V to an automatic optical projector.

which a series of separate pictures are one after the other projected ona screen, the pictures remaining in view short intervals of time, and afurther-object of the inven-I iion is to maintain the pictures on theAscreen for intervals of time controlledby the user.

The organization of the invention com-'A prises essentially two'pairs ofhorizontal.

One pair of conveyers moving coiiveyers.- Y spaced from the otherVpairand moving slides with pictures to the front ofthe projector and theother pair of conveyers moving slides to the rear of the projector.

Means are provided to shift the slides quickly at the front oftheprojector to the space between the conveyers, and' simultaneously toshift the slides Vtothe space between the conveyers at the rear of thepro The picture on the slide between jector. Y the conveyers at thefront of the projector is projected on a screen. i

Fig. 1 represents a ytop plan view of an exeiiiplification vof theautomaticv optical projector with the cover thereof removed; Fig; showsa top plan view of some details; Fig. 3 shows a diagrammatic section ofsome details on the line 3, 3 of Fig. 1`; Fig. 4

' shows a diagrammatic section of some 'details on the line 4, 4V ofFig. 1; Fig. 5is a partial section of the projector as on the` line5,'5of Fig. 1; Fig. 6- represents a plan view of a fragmentary portion AofF'. 5;

Fig. 7 is a section of 1 on the line 1, 7;- Fig. 8 shows an elevation ofa detail; Fig; shows cross sectionsof the vprojector takenV on the line9, 9 of Fig. 1- and the line 9a, 9'?

'of Fig. 10; Fig. 10 is a partial cross section f ofF ig. 9 on the line1Q, 16; F 11 shows Aa cross section of Fig.l 1 on the line. 11, 11

Fig. 12 isa fragmentary portion ofFig. 11 with some of the elements in adifferent position; Fig. 13'shows a perspective view of the cam shaft-of the projector and some of its appurtenances; Fig. 14'shows anelement of. the projector` partly inV vertical section; Fig. 15is asection of Fig. 14 on the line 15,.15;'Fig'. 16 represents alfrontelevation of vthe projector on a reduced scale and Yanelevation ofacabinet therefor partly in vertical section; Fig. 17. is in part a lefthand side view and section of Fig. 16 on the l l `line '17, 17 and'Fig.18 showsa diagrammatic The object of the invention is thevproduc# tionof an optical projector by means ofprojector. v Y

`This exemplification of the automatic optical projector is representedto consist of view of the electrical'appurtenances of the vthe housingindicated in its entirety bythe letter A, which vconsists of the frontwall 20, rear wall 21, side'4 walls22'and 23 and the bottom wall 24.vThetop edges of the said front, rear and side walls are grooved at 26.

`The side wall 23 has formed therein an openfing '30. for the cover 31..A receptacle 32 extends up from the bottom wall 24 and has formed inits sidewalls journal bearings 33, 34 and 35.' A cover 36 with thebracket 37 1,489,532 :Muri-:OFFICE is provided for the receptacle 32. Ajournal bracket 38 extends .up from the bottom wall 24.*A' bracket 37lextends from the frontl wall 2O of the housing A. A cover for thehousing'Ais'indicatedin its entirety by the` letter B and'coinpris'esythe roof 40 with'the i 56 extend between thel bottom wall 24 ofthehousing A andthe roof 40 of the cover B.

A'slioulder 57 is formed tions. 1 Y The portions `55 are threaded' attheir v'upper ends 'and said threaded portions extend through the`bosses 53 Vof the roof 40 between said por- .and are provided with nuts58 to clamp'the.l

cover Bin'place. Threaded portions 59 are formed just above theshoulders V57. The

portion 56 of each stanchion is shouldered at 61 to form the reducedportion 62 that extends through the boss 29 and is threaded at 63 forthe nut 64. A detachable foot 65 is supported on the reduced portion 62and is clamped to the bottom face of the bottom wall 24 by means of thenut 64.

Detachable covers 66 are supported in the grooves 26 and 45 and are heldin place by means of screws 67.

A detachable conveyer frame is. desig-l nated in its entirety by theVletter C and is located within the housing A. The frame C comprises thefront'wall 7 2, rear wall 73 and side walls 74 and 75. Cross walls 76and 77 connect the front wall 72 and the rear wall 73. Similar brackets78. and 79 extend from the side wall 7 4, andeach have formed therein a`guide opening 80 Yfor one of the stanchions already described and haveformed therewith the threaded bosses 81. A journal bearing bracket 85vextends.

from the outer face of the wall 74 and a journal bearing bracket 86extends from the innerface of said wall 74. From the outer face of thewall extend the brackets 88 and 89 similar to 78 and 79. Each of thebrackets 88 and 89 have guide openings 90 similar to and threaded bosses91 simi-.

.100 and the throat 101 with the iiange 102.

The leg 99 is located uponthe roof 40 of the cover BA over the opening52 and is fastened to said roof by means of the screws 103. A lantern108 is secured to the flange` 102 of the throat 101 by means of thescrews 109.

The leg 100 has a forked end 112. An

electric bulb 113 is contained in the lantern.

108 and has extending from its socket 114 the extension 115, whichlatterA is located between the members of the forked end 112. A screw116 extends from the extension 115 and with the washer 117 adjustablyclamps the bulb 113 in different positions in said lantern. A curvedreflector 120 in said lantern is provided for the bulb 113.

A sleeve 125 with the three lens condenser 126 is contained in thethroat 101 of the bracket D. An objective lens having the.

sleeve 127 is in threaded engagement with an opening in the leg 99 ofthe said bracket D. Journal brackets 128 extendV vfrom the leg 99 andhave pivoted in theirlower ends the fiat refiector 130. A bracket 131 onthe An electric motor 135 is supported uponV the cover 31 of the housingA. On the armature shaft 136 of the said motor is secured one member 137of an Oldham coupling. In the receptacle 32 is journaled a woriny shaft138 with the second member 139 ofy the Oldham coupling. A worm 140 isfastened to the shaft 138. A shaft 141 at right angles to the shaft 138and belowy the latter is journaled in the receptacle 32.

lA worm'wheel 142. which meshes with the worm 140 is fastened to theshaft 141, and a worm 143 is also fastened to said shaft 14,1. Acamshaft 147 parallel to the shaft 138 is also journaled in and extendsthrough the receptacle 32. A worm wheel 148 is fastened to the cam shaft147 and meshes with the worm 143. A fork oscillating cam 150 is fastenedto one end of the cam shaftVV 147, and a fork shifting cam 151isfastened to` theother end of said cam shaft. The driving member 152 ofa Geneva movement isalsofastened to the cam shaft 147.

In thebracket 98 of the frame C is supported the threaded journal pin155 on whichr is journaled the driven member 156 of thesaid Genevamovement. A spur gear 157 yis formed with the said member .156.

A tubular shaft 160 is tightly supported in an opening in the bracket 95and the cross wall 77 of the frame C. A lower sprocket conveyer drivingydrum 162 with sprocket teeth 17 0, and similar to the drum 162 isjournaled on the shaft 168. A conveyer band 171 with the sprocketopenings 172 is supported on the drums 162 and 169, the said openings172 engaging said teeth 163 and 170 of said drums. Slide channels 175are fastened to the outer face of the conveyer band 171. Tubularsupporting rollers 176 are journaled in the side wall 75 and in thelcross wall 77 of the frame C and support the upper member of theconveyer band 171 between the drums 162 and 169.

'shaft 160 :is fastened in the bracket85 and' A vertical shaft 178 isjournaled in the bracket 95 of the frame C and in the bracket 48 of thecover B. A bevel gear179 is fastened to the lower end of the shaft 178and meshes with the bevel teeth 164 formed with the drum 162. A bevelgear 184 is in frictional engagement with the upper end of the verticalshaft 178. AV tapered and threaded lug 183 extends from the lower faceof thev bevel gear 184 and is split as indicated at 185. A clamping nut186 engages the lug 183. An upper drum shaft 187 is journaled in abushing 188 secured in the cross wall 48, the bushing 189 secured in thecross wall 49, the bushing 190 secured in the cross wall 50 andthebushing 191secured in the cross wall 51. A bevel gear 192 is fastenedto one end of the shaft 187 and meshes with the bevel gear 184. Asprocket conveyer driving drum 193 having the sprocket teeth 194 andsimilar to the sprocket drum 162 is journaled adjacent to one end of thedrum shaft 187. Bevel teeth 195 are formed with one end of the drum 193and said teeth mesh with the bevel teeth 184. A second shaft 198 similarto the shaft 187 and parallel thereto is fastened in the crossl walls48, 49, 50 and 51. A sprocket drum 200 similar to the sprocket drum 193and having the sprocket teeth 201 isjournaled on the shaft 198. Aconveyer bandV 203 similar to the conveyer band 171, with the slidechannels 204, is supported on the drums 193 and 200.

An upper sprocket 'driving drum 206 with the sprocket teeth 207 andsimilar to the drum 193 is keyed to the shaft 187. Bevel teeth 208similar to the teeth 195 of the drum 193 are formed with the drum 206.

A drum 209 similar to the drum 200 is journaled on the shaft 198on alevel`with4 the drum 206. A conveyer band 210 similar to the conveyerband 203, with slide channels 211, connects the kdrums 206 and 209.

The conveyer bands 171 and'203, respectively, with the slide channels175 and 204 1 will herein designate as the pair of'conveyers L. Y

A vertical shaft 215 similar to the shaft 178 is journaled at its lowerend in the bracket 85 of the frame C, and its upper end is journaled inthe cross wall 51 of the cover B. A bevel gear 216 similar to thebevelgear 184 is in frictional engagement with the upper portion of theshaft 215. A tapered and threaded lug 21? extends from the lower face ofthe said bevel gear 216.and is split in a manner similar to the bevelgear 184. AA clamping nut 218 similar to 186 engages the lug217. Thebevel gear 216 is in mesh with the bevel teeth 208 of the drum 206.v

A bevel gear 220 is fastened to the lower portion of the vertical shaft215.

A tubular shaft 221 rsimilar to the tubular 1. 168Y and 229.

to the cross wall 76 of the frame C. A

lowerdriving sprocket drum 225 similar to the drum 162 and havingsprocket teeth 226 is journaled on the shaft 221. ABevel teeth V227k areformed with one end of the drum 225 and mesh with the bevel gear 220. Alower sprocket drum 228 similar to the drum 169 is journaled on theshaft 229, simi-V lar to the shaft 168. tened to the bracket 86 and thecross wall 76 of the frame C. Y

A conveyer band 230 with the slide channels 231 and similar to theconveyer band 171 connects the drums 225 and 228.

Tubular supporting rollers 235 similar to 176 are journaled in the sidewall 74 and The shaft 229 is fas# in the cross wall 76 of the frame Cand supl port the upperv member of the conveyer-band 230.

245. The said guide forks 242 and 243 are pivoted on the shafts 221 and160.

A pivot 246 extends from one of the walls of the receptacle 32 and haspivotedthereon the lever F having the arms 247, 248 and 249. The arm 247has. formed therewith the' toothed sector 250 which meshes with theteeth 244 of the fork 243. The arm 248 has journaled thereon the camroller 251. The cam 150 of the cam shaft 147 coacts with the cam roller'251;

A link 252 hasfone end pinned to the arm 249. The arm 249 engages thecontact bar 410 of the automatic electric switch R to be described. Aspring 253 has one end fastened to the arm 247 and its other end isfastened to the'bracket 37-of the cover 36 of the receptacle 32.

A lever 257 is pivoted at one end to the bracket 38 of the housing A andat its other end is formed the toothed sector 258. link 252 is pinned tothe lever 257. Y

A box lShaped trolley track G similar to i207,

E is'shown with the bottom runway rails 260, and the top guide rails261. A guide fork 262 with spring fingers 2621 similar'` to 242 isformed with one end of the trac-k G, and at the other end of said trackGr is formed a guide fork 263 withthe spring lingers 263a similarrto 243and the guide fork 263 has formed therewith the toothed vsector 264similar to 244. The said guide forks 262 and'263 are pivoted on theshafts The v A shifting trolley H comprises the body portion or frame270 with the depending portions 271.

Axles 272 extend through and are fastened to the said depending portions271. of rollers 273 are journalcd on the axles 272. The rollers 273 runon the runway rails 240 and are guided by the top guide rails 241.

An arm 276 has one end fastened to the top face of the body portion 270of the trolley H and to its other end is fastened a spring linger havingthe tapered members 277. A second arm 278 similar to 276 is alsofastened to said body portion 270 and to its other end is fastened aspring finger having the tapered members 279 similar to 277. A thirdspring finger with the tapered members 280 extends from the adjacentends of the arms 276 and 278. Guide openings 283 are formed in thedepending portions 271 for the shifting rope 284. A guide pulley 285 isjournaled on a screw pivot 286 extending from the bracket 78. A guidepulley 287 is journaled on a pivot 288 extending from the bracket 88.V

A guide pulley 289'is journaled on a pin 290 extending` from the bracketA guide pulley 291 is journaled on a pin 292 extending from the bracket79.

A double grooved drum 296 has formed therewith the spur gear 297. Thesaid drum is journaled on the pivot 298. The pivot 298 at one end hasformed therewith the reduced portion 299 with the threadedy end 300. Theportion 299 is supported in the bracket 97 and clamped in place by thenut 301. A second reduced portion 302 is formed with the pivot 298,which has exg tending therefrom the squared end 303. A threaded end 304extends from the squared end 303. A spring tension adjusting disc 305with the holes 306 and the sleeve 307 with the slot 308 is pivoted onthe reduced portion 302 of the said pivot 298. A fork 312 has one endengaged with the squared end 303 and has extending from it the lockingpin 313 which can lock with the holes 306. A nut 314 engages thethreaded end 304 to hold the fork 312 in place. a

A spiral spring 317 is located within the drum 296 and has one end 318fastened to said drum and its other end 319 is secured in the slot 308of the disc 305. The shifting rope 284 winds around the `double grooveddrum 296 and the pulleys 289, 291, 285 and 287. The ends of the rope 284enter a cavity in the drum 296 and are tightened therein by means of aplug 320. A pair of clamps 324 are fastened to the rope 284 between thedepending portions 271 of the trolley V270. `Springs 325 en.- circle therope 284 between the clamps 324 and the said depending portions 271. Ashifting lever 1 with the arms 330 and 331 Pairs with the shifting cam151 on the cam shaft is pivoted on a screw pin 332 supported on thebracket 37 a of the housing A. A threaded sector 333 is formedv with thearm 330 and meshes with the spur gear 297.1 A roller 334 is j ournaledin the arm 331 and contacts A second trolley J similar to the trolley His supported on thetrolley track G. An

arm similar to the arm 276 has one end fastened to the top face of thebody portion of the trolley J and at its other* to the one having thetapered member 280v extends from the adjacent ends of thearms- 335 and337.

Brackets 342 and 343 extend from the side walls 76 and 77 and supportthe lower front connecting slide channel 344 and the lower rearconnecting slide channel 345. A front upper connecting slide channel 346and a rear upper connecting slide channel 347 are secured tothe crosswalls 49fan'd 50 of the cover B.

To the brackets 342Y isY fastened a lowerY slide stop 350, and to thebrackets 343 is fastened a similar lower slide stop 351.

Brackets 353 and 354 extend from the cross walls 49 and 50 and supportthe upper slide stops 355 and 356; Brackets 360,- 361 extend from one ofthe detachable covers 66 and support the upper and lower slide stops 362and 363. Brackets 365 and 366 extend from the opposite cover 66 andrespectively support the upper and lower slide stops 368 and 369.

Referring particularly to Figs. 16 and 17 the projector with the housingA, cover B and the detachable covers 66is located in the cabinetdesignated in its entire-ty by the letter Pz having'the bottom 380,side-walls 381 382, front wall 383 and the rear wall 384 with the curvedroof 385. A screen 388 of translucent glass is located in a frame 389 ofthe front wall 383. An inf clined reflector plate 390 is secured to thecurved roof 385 ofthe cabinet.

Referring particularly to Fig. 18 there is indicated the electric motor135, the electric bulb 113, the electric push button Q, the

401 and between the guide strips 402." A

spring 405 extends around the plunger 403 in the shell 401, between theguide strips 402 and the collar 404. vThe automatic electric switch Rcomprises the contact bar 410 which is engaged by the end of the arm 249of the lever F. Thev contact bar410 'has formed therewith the contactprojection 411. A contact spring piece 412V with the rests 413 and 414is located in the switch forthe lower side of the contact bar 410. Acontact 415 in the switch R is provided forv the upper side of the saidcontact bar 410. Vfires 419 and 420 lead from a source Vof electricityand have respectively connected thereto the fuses 421 and 422. A wire423 connects the wire 419 with the electric switches 394 and 395. A wire424 leads from the switch 394 to the contact 415 of the automatic switchR and a'wire 416 connects the wire 424 and the contact spring finger 400of the push button Q. A wire 425 connects the switchV 395 and-one poleof the electric bulb 113. A wire 426 extends from the other pole ofthesaid electric bulb and connects with the wire 420. A wire 427connects the wire 426y with one of the brushes of the electric motor135. A wire 428 leads from the other brush of the electric motor andconnects with the contact' operation of the projector is required,eliminating. the switch R. j

The rays of light from the electric bulb 113 enter the condenser 126 andpass through the slide which is located in front of the condenser, theslide in this position being indicated by K. The rays of light pushbutton Q andthe automatic are reflected through the objective lenshaving the sleeve 127. From the objective lens the light rays canproject on a horizontal screen above the projector, or they canbedefiected on a vertical screen by the plate reector 133', or when thecabinet P is used the light rays are refiected by theV reflector plate390 to the screen 388. v The refiector 120 increases'the volume of theYVlight rays emitted from the electric light bulb 113. Rotation vistransmitted from the armature shaft 136 to the worm shaft 138. The worm140 0f the shaft 138 transmits rotationto the worm wheel l142 bymeans ofwhich the'shaft V14,1is1turned. Theworm V143onthe shaft -141 turns theworm wheel 148 on the cam shaft 147. The cams 150, 151 and the drivingmember 152 of the Geneva. movement turn with said cam shaft. i

The cam'151 actuates the roller 334 of the` ticularly to Fig. 9 theroller 334 from the" the face 151" 'of the rotating cam V151, whichpermits the tension ofthe spiral spring 317 to turn the drum 296 'inthe' direction of the arrow 37 5.v moves the shifting rope 284 in thedirection of. the arrow 376. Thereby the shifting vtrolley H is moved inthe direction of theA arrow 376 andthe shifting trolley J is moved inthe direction of the arrow 377. By this? means one ofthe slides'K ismoved from the pair of consveyers L to its projecting position indicatedat K', and the Vprevious This movement of the drum* .position thereshown'is about to travel down slide which was located Aat the positionK: i

-is moved to'pair of conveyors M and takes the position K2; the sametime one'of slides K of the pair of conveyers M is moved at the rear ofthe projectorft'o the position K3i behind the plate reflector 130. YPreviously thereto' the slide thatwas in the;

position K3 is moved to the pair ofcon-V veyers L as indicated at Kt.`The distance traveledl by the trolleys H and J in the 'movements justdescribedis controlled by the coaction of the roller 334 and the shiftfing cam 151, and after the slides are positioned as justdescribed theyremain at rest for aninstant of time. During the interval of rest thespring fingers having the tapered members'279, '280 and 277 of thetrolley H andthe spring fingers having the tapered members 338,339 and336rdisengage from` between the slidesV and are replaced by the springfingers245, 2423, 262"l and 263% The means actuating the spring 'fingerswill be described hereafter.

The cam roller 334 is now in contact with 284 in a direction oppositethe arrows 37 6. l Y '1'20 and 377.V

the lower portion of the cam indicated at y next impinge on the platereflector 130 vand The'drum2'96 turns inthe direction just described'untiljthe roller 334 reaches 'the point`151d on thefcam surface ofthecam 151.V At this instant the spring fingers having the tapered members279, 280 and l277-v 'ofthe trolley H and the spring fingers having thetapered members 338, 339 land 336 move-*in `mesh with' the 'spacesbetween the 'slides as Vshown"specially in Fig. '1, and at the sameitime'fthe" spring-ng'ers` 245,V 242?,

262a and 263n are mofved out of mesh with said slides. During the periodthat the trolleys H and J move in directions oppol said driven member156, of the Geneva movement. By this means, the sprocket drum 162 isturned. At the same time the vertical shaft 17 8, the drum shaft 137,the sprocket drum 193, the sprocket Ydrum 206, the -verticalshaft 215and the sprocket drum 225 are turned, to produce a movement in each ofthe pair of conveyers for one slide in each. n 1 l To take upqthebacklashv ofY the bevel gears 179, 18e, 192, 208, 216 and 220, the bevelgears 1841 and-216 are turned to take up said 'back lash, and thenclamped in place respectively by means of the clamping nuts 186V and218.

The guide fork-243 with its spring tiiigers 245 and the' runway 'rails2110, top guide rail 241 and the guide fork 242 with its spring lingers242a and the guide fork 263 with the spring lingers 263g, the runwayrails 260, top guide rails 261V and the guide fork 262 with its springfingers 262a are actuated as follows. When the cam shaft '147 turns, theroller 251 isj'actuated by the cam 150. By' this means thetoothedse`ctors 25() and 258 respectively oscillate the f cscillatev with theirrails together with the guide forks 243, 212, 263 and 262.

"When an interrupted mode of operation is required, the wire 130 iseliminated, so that the push button Q and the automatic switch R can beused. By' means of these appurtenances, the projector is stopped bymeans of automatic switch R- and started by means of the push button Q.lVith this mode of operation, the cam roller 251 as indicated in Fig. 12is about to move up, by means of the fork oscillating cam 150, and thetapered members 279, 280 and y277 of the trolley H and the springfingers' 333, 339 and 336 of the trolley T enter ybetween the slides.`At" the same time the arm '249 of the lever F nieves the Contact' bar410 of the switch R, from the rest 413 to the rest 414, and breaks theelectric circuit of the electric motor 135, and thek projector thenstops.,v but thel electric v,bulb 113 reina-ins energized and projectsthe picture ofthe slide to itsoaetng screen for any time desired. Whenthe push button Q. is pushed in, the metallic. plunger'fl03 contactsA'with the metallic contact lingers 399 and' e100 and closes theelectric circuit to again start the electric motor 135. Y must 'continueto close the electric circuit of the motor while the roller 251 oi thelever F is in contact with :the cam surface 1.60a of the cam 150.

Having described our in.en.tion what we 1i desire to secure by LettersPatent` and claim is: shaft 117 which intermittently turns the 1. lnanoptical projector the combination of two pairs of conveyers, theconveyors of each paircoacting to simultaneously con vey a. plurality ofslides, means tol simultaneously move the conveyors and shifting meansto simultaneously shift the slides. one after the other, at each end ofthe conveyers from each pair of conveyers Lto a.'

`each pair one over the other, means toI simultaneously move theconveyors, .leach pair of conveyers adapted to convey a plurality ofpicture yslides at right anglesto the axes of the drums and means toshift the` slides from one pair of conveyers to a position between theconveyers. said nir-:ans thereafter simultaneously shifting the slidesfrom the position between the conveyers to a pair ofthe c-onveyers.

3. In an optical projector the combination of two pairs of co'nveyersparallel to each other and spaced apart, drums for the conveyers, meansto drive each pair of conveyers in directions at right angles to theaxes of the drums, the vdirection of the movement of one pair ofconveyers opposite 3- a second pair of conveyors one over the other andspaced from the first pair,a pair of Vdrums for each'pair of conveyers,each :pair .of conveyors adapted to loosely sup-V port plurality ofslides, means to simultaneously drive the conveyor in' directionsAat'rigrrht vangles to the axes of their drums Yand opposite to eachother, means to shift the slides one after' the other from one pairk 'ofconveyers to the space between them, IneaI.1..S to detain the slides insaid spacefor The push button Q* lio each aninstant of time, means toshift the slides from said space to the second pair of conveyers, thesecond pair of conveyers moving the slides to rear of the projector,means to shift the slides to the space between the conveyers at the rearof the projector, means to shift the slides to the first pair ofconveyers, and means to drive the first pair of conveyers to locate theslides in their original positions.

5.y In an optical projector the combination of a cam shaft, means toturn the cam shaft, a driving member of a Geneva movement on the camshaft, a detachable conveyer frame for the projector, a journal pinextending from said frame, a driven member of said Geneva movementjournaled on saidpin, a spur gear integral with said driven member, alower stationary shaft securedv inV said fran'ie, a sprocket conveyerdriving drum journaled on the latter shaft, spur gear teeth formed withthe drum Ameshingv with Vthe spur gear integral with the driven memberof the Geneva movement,bevel teeth formed with said drum, a housing forsaid frame, a cover forV said housing, a vertical shaft journaled at oneend in said coverand at the other end in the conveyer frame, a bevelgear fastened to the vertical shaft meshing with the bevel teeth of thedrum, a second bevel gear fastened to the vertical shaft at its upperend, an upper sprocket drum shaft journaled in said cover, a secondsprocketconveyer driving drum journaled on the latter shaft, a bevelgear fastened to the latter shaft meshing with the bevel gear'at theupper end of the vertical shaft to drive the drum shaf-t, bevel teethformed vwith the second drum also meshing with the bevel gear at theupper end of thevertical shaft, a third driving drumv fastened to .theupper drum shaft, bevel teeth formed -with the latter drum, `a secondvertical shaft journaled at one end in said cover and at the other endin the conveyer frame, a bevel gear fastened to the upper end of thesecond vertical shaft meshing with the bevel teeth of said third drum, abevel gear fastened to the lower end of said second vertical shaft, asecond lower stationary shaft secured in said frame, a lowerdrivingsprocket drum journaled on said second lower stationa shaft andbevel teeth formed with the latter drum meshing with the bevel gear atthe lower end of the second vertical shaft.

6. In an optical projector the combination of a trolley, an oscillatingtrack for the trolley, arms secured to the trolley, a pair of springfingers fastened to the trolley between the arms, a pair of springfingers at the outer ends of the arms, a pair of guideforks with springfingers on the track spaced to register with the spring fingers on thetrolley between said arms and either one of the spring fingers at theends of the arms and means to oscillate the tracks with the trolley. l

7, In anioptical projector the combination of a trolley for the frontthereof and a trolley for the .rear of the projector,fa-pair ofarmsextending from each-trolley, a pair of spring fingers' fastened to eachtrolley between the arms, a pair of spring fingers at the outer end lofeach arm, atrack .for each trolley, a pair' of guide forks with s rincrtin ers for each tracks aced'to refr.-

ister with the -spring fingers on each trolley between the arms thereofand either one of the spring ngers at the end ofone ofits arms, a pairofconveyers adapted'to move slides in position between the spring -fingersat the end of one Vof said Aarms and the spring fingers betweenA saidarms on one trolley, a second pair of conveyers'adapted tomove slides inposition between 'the spring*k spring lingers `at the end of one of the,arms of thesecond trolley and the spring fingers between the Varms ofthe second their trolleys and appurtenancesV tof oscillate them to.their original positions.

V8. In an optical projector the combination ofa pair of oscillatingtracks` a trolleyimovably supported on each track, means on each trolleyto engage a pair of slides, a toothed sector formed with each track, apair of le- 'versea'chvwith a toothedlse'ctor pivotedin the projector,Vthe sectors meshing respectively with the toothed sectors ofthe tracks,

a link connecting the levers, a camY roller journaled on an arm of oneof the levers', a rotating cam shaft journaled in. thek projector and acam fastened to the cam shaft contacting with said roller;

` 9. In an Aoptical projector the combination of' a housing, adetachable conveyer'frame connected tothe housing, guide pulleysjournaled in the frame, a pivot in the frame, a drum journaled on thepivot, a shifting rope with its ends fastened to the drum extending overthe said drum and bearing on said guide pulleys, a pair of shiftingtrolleys fastened to the shifting rope, a pair of arms carried by eachtrolley, a pair of spring fingers between each pair of arms, a pair ofspring fingers at the end of each arm, a spring tension adjusting discadjustably supported on said pivot, a spiral spring with aos one endfastened to the drum and its other' end fastened to said disc, a. spurgear integral with said drum, a lever pivoted in the housing and havinga toothed sector formed therewith, said sector meshing with said spurgear, a roller journaled in an arm of said lever, a rotating cam shaftin the housing and acam fastened to said cam shaft` contacting with saidroller.

10. In an optical projector the combination of a housing, a shiftingtrolley for picture slides in the housing, a trolley track for thetrolley, a. toothed sector formed with the track, a. lever with atoothed sector at one end pivoted in the housing of the projector theteeth of said sectors meshing with each other, an automatic electricswitch in the housing, a. movable contact bar for the electric switch,the said lever engaging said contact bar, a cam roller ourna-led in anarm of lsaid leve-r, a rotating cam contacting with said roller, andelectric motor in the housing in circuit with said automatic switch andan electric push button in electric parallel with said switch.

11. In an optical projector the combination of a. housing, a shiftingtrolley for picture slides in the housing, a trolley track for thetrolley, a toothed sector formed with the track, a lever with a toothedsector at one end pivoted in the housing, the teeth of said sectorsmeshing with each other, a cam roller journaled on an arm of said lever,a rotating cam contacting with said roller, a cam shaft for said cam, anelectric motor in the housing to turn the cam shaft, an electric lightbulb in parallel with said electric motor, an electric switch for themotor and an electric switch for the electric light bulb.

12. In an optical projector the combination of a plurality of shafts forconveyer drums, gears connecting the Vshafts and drums to simultaneouslyrotate them, one of said gears having a tapered slit lug exteriorallythreaded formed therewith, and a clamping nut for said lug to'clamp itwith its gear in operative position toits shaft.

13. In an optical projector the combination of a. housing, two pairs ofconveyers for picture slides in the housing, a pair of shifting trolleysin the housing coacting with the conveyers, a pair of depending portionsfor each trolley, means on the trolleys to engage the slides, a rope inthe housing, means to through the depending portions of the trol- Yleys, clamps fastenedto the rope between the depending portions of eachtrolley, a pair of springs encircling the rope between the dependingportions of each trolley and the clamps between the said dependingportions.

14. In an optical projector the combination of two pairs of conveyors,each pair of conveyors adapted to support a multiplicity of slides,means to move each pair of conveyors with its slides in oppositedirections, shifting devicesA in line with the opposite ends of theconveyors, adapted to engage the terminal slide located at the forwardend 0f the direction of motion of the respect-ive conveyors and shiftthe slides independently of the other slides to the rear end of theother conveyor. Y

15. In an optical projector the combination of two pairs o-f conveyors,slide channels fastened to the conveyors adapted to loosely engageslides, a trolley in line with the opposite ends of the conveyors, apair of A arms withspring fingers at their ends eX- tending from eachtrolley, means tozlongitui dinally move the trolleys and means to swingthe trolleys, the trolleys adapted to pick up the terminal slide fromtheforward end of each conveyor andV move the slides to the oppositeconveyor.

16. In an opt-ical projector the combination of two pairs of conveyors,means on each pair of conveyors to loosely engage slides,.means to movethe conveyors in oppo site directions and ineansrat each end of theconveyors to shift the slides at the ends of the conveyors from one tothe other.

17. In an optical projector the combination of. two pairs ofv conveyors,the conveyors of each pair one over the other, slide channels attachedto each conveyor, a pair of slide channels of each Vpair ofconveyorsadapted to loosely support a slide and shift,- ing means at theends of the conveyors adapted to shift the slides from one pair ofconveyorsto the other.

Si 'ned at the borough of Manhattan, city of i ew York, in the county ofNew York and'State of New York, this 12th day of February, A. D. 1921.

' OTTO EDIVARI) ENELL. JOHN ERNEST MEYER.

Certificate of Correction.

It is hereby certified that the name' of the assignee in Letters PatentNo 1,489,632, granted April 8, 1924, upon the application of Otto EdwardEneli, of Jersey City,

New Jersey, and John Ernest Meyer, of New York, N. Y., for animprovement in Automatic Optical Projectors, should have been Writtenand printed as Vctor U. Thorne' instead of Victor '.Ihorne, as shown bythe records of assignments in this ofiice; and that the said LettersPatent should be read with this correction therein that the saine ma)vconform to the record of the case in the Patent Oiice.

Signed and sealed this 20th day of May, A; D. 1924.

[SEAL] KARL F ENNING,

A01/ing Commissioner of Patents.

